C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Mystery Box

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Old May 5, 2025 | 08:07 PM
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Default Mystery Box

Hello everybody. Thank you for your feedback in advance and in regards to this post please feel more than happy to chime in with Corvette humor. As I’m working on my C4 I found another piece of equipment hidden behind the center console by the carpet. I kind of find it odd that Chevy would put something like this in here. So it was before the days of GPS tracking, so what are your thoughts?


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Old May 5, 2025 | 08:13 PM
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Likely a device similar to LoJack for security? It wouldn't be that odd in C4 to find LoJack or others.
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Old May 5, 2025 | 08:55 PM
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I found a similar box in my 1992.
Here is a copy/paste of the post I made about the discovery.

Originally Posted by IHBD
.020Ma isn't much. About .500MaHr per day. 15 Ahr per month. Add it to the regular incipient draw in a C4 and .020 Ma can make a difference after a month in a car that isn't driven much. Here's a source of a draw I don't think I've seen mentioned on here.

I was messing around with my recently purchased 92 today. I opened the ABS compartment and found some non-OEM looking wires. I saw in the records from the OO that the car had been equipped with this in 1996, and knew I'd find it eventually. I took it out, and just for grins powered it up on my bench. .020 Ma.

LoJack. This one was wired to the B+ for the ABS/TCS, so it was powered at all times. Note that the back-up battery is .8 AHr. So if the main battery were cut or removed, the back-up is good for about a day and a half. I remember back in the hey days of LoJack that thieves would leve a car dormant for a couple of days after jacking it to be sure it didn't have a tracker. The antenna is the foam thing, it was under the rear carpet so it had a view of the sky. The whole deal is now in the traqsh.


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Old May 5, 2025 | 09:02 PM
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Thank you so much for all the feedback. Now I’ll have to find if there’s a mystery battery somewhere in the car. Thank you guys for all your feedback.
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Old May 6, 2025 | 06:35 AM
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That is definitely not from the factory
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